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jan 24, 1932 - Discovery of Neutrons: Neutrons were discovered in 1932 by James Chadwick. Before the experiment a 3rd particle had been proposed to account for missing mass. They knew that it would weigh the same as a proton and have no charge. The existence of the particle was confirmed by James and he won the 1935 Nobel physics prize.

Added to timeline:

2 months ago
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Discovery of Particles

Date:

jan 24, 1932
Now
~ 86 years ago

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